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in the gravel that will evaporate when the material is mined. Table G -2 shows the total <br />consumptive uses anticipated for this site. <br />5.1 Control dust on the haul roads and excavation areas <br />Water used for dust suppression is usually 100 percent depletive with no measurable return <br />flows to the river system. Dust from the haul roads will be controlled by paving for all areas <br />outside the mining pit boundary. Water will be used on all in pit roads. Water will only be <br />applied when needed at this elevation, since cold conditions on site for much of the year <br />result in little evaporation and/or dust. The main access road will be graveled to reduce the <br />water requirements. It is assumed that watering of roads will require 900 gallons water 4x per <br />day for 100 days per year. Other days will have natural moisture on the roads or the site will be <br />inactive since the annual production is not very high. This is equivalent to 1.10 acre feet per year. <br />It is also assumed that additional amounts may be needed during very dry windy conditions <br />during the mining operation. This use is expected to be 1.2 acre feet per year. Therefore, the total <br />consumptive use for this category is 2.3 acre feet per year. <br />5.2 Crushing and Screening Plant Operations <br />The crushing/screening plant uses roughly a gallon of water per ton of raw gravel. This equates <br />to roughly 100,000 gallons per year, or 0.31 acre feet per year. <br />5.3 Wash plant operations <br />A wash plant is not currently in place at the operation, but may be added at a future time. At such <br />a time, a technical revision would be submitted to DRMS. <br />5.4 Concrete batchina <br />No concrete plant is currently planned at the Hayden Gravel Pit, but Connell Resources <br />maintains the option to add it in the future. At such a time, a technical revision would be <br />submitted to DRMS. <br />Hayden Gravel Pit, May 2013 G -4 <br />